Generic packing motifs in vapor-deposited glasses of organic semiconductors

TitleGeneric packing motifs in vapor-deposited glasses of organic semiconductors
Publication TypeJournal Article
Year of Publication2019
AuthorsBagchi, Kushal, Ankit Gujral, M. F. Toney, and M. D. Ediger
JournalSoft Matter
Volume15
Start Page7590
Issue38
Date Published08/2019
Abstract

We study the structure of vapor-deposited glasses of five common organic semiconductors as a function of substrate temperature during deposition, using synchrotron X-ray scattering. For deposition at a substrate temperature of ∼0.8Tg (where Tg is the glass transition temperature), we find a generic tendency towards “face-on” packing in glasses of anisotropic molecules. At higher substrate temperature however this generic behavior breaks down; glasses of rod-shaped molecules exhibit a more pronounced tendency for end-on packing. Our study provides guidelines to create face-on and end-on packing motifs in organic glasses, which can promote efficient charge transport in OLED and OFET devices respectively.

URLhttps://pubs.rsc.org/en/content/articlelanding/2019/sm/c9sm01155b#!divAbstract
DOI10.1039/c9sm01155b